JP7171979B2 - Metal fittings for fixing retaining walls, method of fixing bracket scaffolding to concrete frame using same, and method of fixing display objects to concrete frame - Google Patents

Description

TECHNICAL FIELD The present invention relates to a metal fitting for fixing a retaining wall, a method of fixing a bracket scaffolding to a concrete frame using the same, and a method of fixing a display object to the concrete frame.

BACKGROUND ART A reinforced earth wall construction method is known as one of retaining walls for retaining earth when embankment is constructed, for example, in a vertical direction with respect to a ground surface. The reinforcing earth wall construction method is, for example, a construction method as shown in FIG.

First, as shown in (a) of FIG. 17 , a plurality of concrete skeletons 912 (also called concrete skeletons or concrete skins) are arranged, for example, in the vertical direction on a leveled surface 902 that serves as a foundation. . On the back side of the concrete frame 912, the spreading of embankment material (earth and sand), rolling compaction and compaction, and the arrangement of reinforcing materials 914 such as steel strips and planar geotextiles extending in the horizontal direction are alternately repeated. Next, when the embankment material is spread to the height of the arranged concrete skeleton 912, rolling compaction and compaction are performed, another concrete skeleton 918 is arranged on the concrete skeleton 912, and the same as above. On the back side of the concrete frame 918, the spreading of the embankment material, rolling compaction and compaction, and the placement of the reinforcing material 914 are alternately repeated. After that, a bracket scaffolding 916 is attached to ensure the safety and workability of the worker during the construction of the uppermost step (top end) of the concrete frame 918 (FIG. 17(b)). Finally, a retaining wall 920 is formed in which the embankment material is placed on the entire slope 904 and the concrete frame is placed in a substantially vertical direction, and shading concrete 922, for example, is placed above ((c) in FIG. 17). In the construction of this shade concrete 922, a formwork is installed on the outside, ready-mixed concrete cast on site is placed, cured, and removed from the mold. Next, earth and sand (embankment material) is spread to the height of the constructed shade concrete 922, rolling compaction and compaction are carried out.

The bracket scaffolding is fixed to the concrete frame, for example, through pre-installed threaded metal fittings such as cross-cut bolts and eyebolts. are placed. After the bracket scaffolding has been moved and removed, these screw fittings 924 still protrude from the outer surface of the concrete skeleton, degrading the appearance of retaining wall 934 . Furthermore, the screw fittings 924 may corrode due to long years of wind and rain and contaminate the retaining wall surface with rust water or the like. Therefore, in order to maintain the appearance of the retaining wall 934, the operator must remove the screw fittings 924 in a state in which the scaffolding has been removed.

However, since such removal work is performed without a foothold, it is dangerous for the operator. Furthermore, it is difficult to say that it is realistic to assemble a bracket scaffold separately for removal. For example, it is conceivable to use a special vehicle such as an aerial work vehicle to remove it, but depending on the construction on the slope and the condition of the embankment structure, the aerial work vehicle etc. cannot approach. In addition, large-scale removal work may be carried out using large heavy machinery or the like. However, such demolition requires heavy equipment costs. Therefore, it cannot be denied that removal is actually carried out by inappropriate and dangerous work.

On the other hand, on highways and roads in mountainous areas, display objects such as destination information boards, road signs, and advertising billboards are sometimes attached to the concrete frame that constitutes the above retaining walls.

However, such displays must be easily attachable and sufficiently secured to withstand the elements. In addition, in recent years, it is desired to keep the retaining wall as clean as possible by facilitating removal and avoiding disadvantages such as damage to the retaining wall during removal.

The present invention solves the above problems. The purpose is to be able to easily fix the bracket scaffolding and the display to the concrete frame when forming the retaining wall, and to expose the worker to danger after moving or removing the scaffolding and the display. To provide a metal fitting for fixing a retaining wall and a method for fixing a bracket scaffolding to the concrete frame and a method for fixing a display object to the concrete frame using the same, which can be easily removed from the concrete frame without removing the bracket.

The present invention is a retaining wall fixing fitting that is inserted into the gaps of a plurality of concrete frames arranged to form a retaining wall, comprising a force point portion, a fulcrum portion and an action point portion in this order along the horizontal direction. a metal fitting body, and a support member fixed to the end portion of the metal fitting body having the power point portion and extending along the vertical direction of the metal fitting body,
The force point portion of the fitting body is engageable with the concrete frame placed downward in the horizontal direction, and is at or above the fulcrum portion in the horizontal direction. and the point-of-action portion of the fitting body is engageable with the concrete frame disposed above the horizontal direction, and is higher than the fulcrum portion in the horizontal direction. It is a retaining wall fixing metal fitting provided at a high position.

In one embodiment, the power point portion of the metal fitting main body is provided at a position substantially at the same height as the fulcrum portion with respect to the horizontal direction.

In a further embodiment, the point-of-action portion of the metal fitting main body includes an engaging portion that engages with the concrete frame disposed above in the vertical direction.

In yet a further embodiment, the ends of said engagement portion comprise receptacles for receiving tie bars arranged over said plurality of concrete skeletons.

In one embodiment, the power point portion of the metal fitting main body is provided at a position higher than the fulcrum portion in the horizontal direction.

In a further embodiment, the point-of-action portion of the metal fitting main body includes an engaging portion that engages the concrete frame disposed above in the horizontal direction.

The present invention also provides a method for securing bracket scaffolding to interstices of a plurality of concrete structures arranged for retaining wall formation, comprising:
a step of inserting any one of the retaining wall fixing metal fittings into the gap of the concrete frame from the end of the point of action of the metal fitting body so that the fulcrum portion of the metal fitting body is positioned downward;
By rotating the retaining wall fixing bracket around the fulcrum portion, the force point portion is engaged with the concrete frame disposed downward in the horizontal direction, and the action point portion is moved to the a step of engaging with the concrete frame positioned above the horizontal direction; and a step of fixing a bracket scaffold to the support member of the retaining wall fixing bracket;
A method comprising:

The present invention also provides a method for fixing a display in the gaps of a plurality of concrete structures arranged for forming a retaining wall, comprising:
a step of inserting any one of the retaining wall fixing metal fittings into the gap of the concrete frame from the end of the point of action of the metal fitting body so that the fulcrum portion of the metal fitting body is positioned downward;
By rotating the retaining wall fixing bracket around the fulcrum portion, the force point portion is engaged with the concrete frame disposed downward in the horizontal direction, and the action point portion is moved to the a step of engaging with the concrete frame arranged above the horizontal direction; and a step of fixing a display object to the support member of the retaining wall fixing bracket;
A method comprising:

In one embodiment, the display is a sign or banner.

Advantageous Effects of Invention According to the present invention, it is possible to easily attach and detach a bracket scaffold and a display object to and from a concrete frame. Also, the fitting itself of the present invention can be easily detached from the concrete frame. As a result, it is possible to form a retaining wall with a good appearance and to reduce the possibility of endangering workers in forming the retaining wall.

It is a perspective view of the said metal fitting which shows an example of the metal fitting for retaining wall fixing of this invention. 1. It is a schematic diagram for demonstrating an example of the style which fixes the metal fittings for fixing the retaining wall shown in FIG. 1 to a concrete frame. FIG. 3 is a partially cutaway cross-sectional view for explaining a state in which the retaining wall fixing bracket shown in FIG. 2 is arranged in a concrete frame; FIG. 4 is a diagram showing another example of the retaining wall fixing bracket of the present invention, and is a schematic cross-sectional view for explaining a state in which the bracket is arranged in a concrete frame. 5 is a partially enlarged view of the schematic cross-sectional view shown in FIG. 4. FIG. FIG. 5 is a view of the concrete frame when the retaining wall fixing bracket shown in FIG. 4 is attached to the concrete frame, as viewed from the back side; Fig. 10 is a perspective view of a metal fitting showing still another example of the retaining wall fixing metal fitting of the present invention; Fig. 10 is a perspective view of a metal fitting showing still another example of the retaining wall fixing metal fitting of the present invention; Fig. 10 is an exploded perspective view of a metal fitting for fixing a retaining wall according to still another example of the present invention; FIG. 10 is a schematic diagram for explaining a manner of fixing the retaining wall fixing bracket shown in FIG. 9 to a concrete frame; FIG. 10 is a partially cutaway cross-sectional view for explaining a state in which the retaining wall fixing bracket shown in FIG. 9 is arranged in a concrete frame; FIG. 10 is a perspective view of a retaining wall fixing metal fitting according to still another example of the retaining wall fixing metal fitting according to the present invention; FIG. 13 is a schematic diagram for explaining a manner of fixing the retaining wall fixing bracket shown in FIG. 12 to a concrete frame; FIG. 10 is a perspective view of a retaining wall fixing metal fitting according to still another example of the retaining wall fixing metal fitting according to the present invention; 14. It is a schematic diagram for demonstrating the mode which fixes the retaining-wall fixing metal fittings shown in FIG. 14 to a concrete frame. FIG. 2 is a diagram for explaining an example of the procedure for attaching a display object to the retaining wall fixing metal fitting of the present invention, in which (a) shows the retaining wall fixing metal fitting of the present invention placed between the concrete skeletons constituting the retaining wall; (b) is a schematic diagram for explaining the state in which the traffic signboard is attached to the retaining wall fixing bracket arranged in (a). It is a schematic diagram explaining the procedure for forming a retaining wall by the conventional reinforcement earth wall construction method. It is a schematic diagram explaining the state of arrangement|positioning of the concrete frame arrange|positioned by the conventional reinforcement earth wall construction method.

The present invention will be described in detail below.

(Fixing bracket for retaining wall)
FIG. 1 is a perspective view of a retaining wall fixing bracket 100 of the present invention.

A retaining wall fixing metal fitting 100 of the present invention includes a metal fitting main body 110 and a support member 160 .

The hardware body 110 is preferably constructed from a single plate of rigid material (eg, steel, stainless steel, aluminum, or other lightweight alloy). As described later, bracket scaffolds and display objects (for example, traffic signs, signboards, banners) (hereinafter collectively referred to as “support objects”) are fixed, and the weight when multiple workers work For example, a medium or thick steel plate (preferably a steel plate having a thickness of 3 mm or more, more preferably 6 mm or more, and still more preferably 9 mm or more) may be used in order to have sufficient strength to withstand against.

The fitting main body 110 has a power point portion 112, a fulcrum portion 114 and an action point portion 116 in this order along the horizontal direction.

A power point portion 112 in the metal fitting main body 110 is a portion where a load from a support object attached to a support member 160 described later is directly applied to a concrete skeleton arranged below. Here, in the retaining wall fixing metal fitting 100 shown in FIG. 1, the power point portion 112 in the metal fitting main body 110 is provided at a position substantially at the same height as the fulcrum portion 114 in the horizontal direction. The power point portion 112 is engageable with a concrete frame placed downward in the horizontal direction. Specifically, in FIG. 1 , a substantially flat bottom surface 118 is formed from the fulcrum portion 114 to the power point portion 112 under the metal fitting main body 110 . All or part of the bottom surface 118 contacts and engages the upper surface of the underlying concrete skeleton to hold the support object attached to the support member 160 in place on the concrete skeleton.

The fulcrum portion 114 of the metal fitting main body 110 rotates the metal fitting main body 110 (or the retaining wall fixing metal fitting 100) around the fulcrum portion 114, so that the retaining wall fixing metal fitting 100 can be attached to or detached from the gap of the concrete skeleton. It can be performed. Although the fulcrum portion 114 is illustrated as having an obtuse angle in FIG. 1, the fulcrum portion 114 is not necessarily limited to this shape in the present invention. For example, chamfering (for example, C-face machining or R-face machining) may be performed instead of the corners forming the obtuse angle.

In FIG. 1, the action point portion 116 of the metal fitting main body 110 is provided at a position higher than the fulcrum portion 114 in the horizontal direction. By providing the point of action portion 116 at such a position, the point of action portion 116 is inserted into the gap of the concrete frame and the support object is fixed to the support member 160 (that is, the force point portion 112 side). When it is closed, it can come into contact with and engage with a concrete frame placed above the horizontal direction. Specifically, in FIG. 1, an engaging portion 120 protruding upward is provided at the end portion of the metal fitting main body 110 (on the side opposite to the power point portion 112). The engaging portion 120 has an engaging surface 122 capable of vertically engaging with the concrete frame disposed above the retaining wall fixing bracket 100 of the present invention. may serve as the point of action portion 116 .

In FIG. 1, the metal fitting main body 110 maintains a substantially parallel width on the left side of the drawing (that is, from the power point portion 112 to the fulcrum portion 114) with the fulcrum portion 114 as the center. On the other hand, on the right side of the figure centered on the fulcrum portion 114 (that is, on the side from the fulcrum portion 114 to the action point portion 116), when removing from the concrete frame, the force point portion of the retaining wall fixing bracket 100 centered on the fulcrum portion 114 To prevent the side from the fulcrum portion 114 to the action point portion 116 from coming into contact with the concrete skeleton arranged below when the 112 side is lifted upward, thereby preventing the retaining wall fixing fitting 100 from being removed. In addition, it has a shape whose width gradually narrows toward the right side of the figure. In the present invention, such a shape of the fitting body 110 is not necessarily limited. For example, this tapered shape may be rounded. These widths can be selected by those skilled in the art in consideration of the shape of the concrete frame itself to be fixed, the strength of the metal fitting main body 110, and the like.

The support member 160 is preferably constructed from a single timber, square pipe, C-bar, or L-angle of rigid material (eg, steel, stainless steel, aluminum, or other lightweight alloy). The support member 160 has its upper end attached to the metal fitting main body 110 and its lower end oriented substantially vertically. In FIG. 1, support member 160 is attached to metal fitting 110 by hex bolt 124 and nut 126 . Instead of such hexagonal bolt 124 and nut 126 , support member 160 may be welded and integrated with metal body 110 . The support member 160 is also provided with a plurality of screw holes 128 substantially parallel to the axial direction (horizontal direction) of the metal fitting body 110 . A bolt (not shown) for attaching a support object is arranged in the screw hole 128 .

FIG. 2 is a schematic diagram for explaining an example of a manner of fixing the retaining wall fixing bracket shown in FIG. 1 to a concrete frame.

The retaining wall fixing bracket 100 of the present invention is inserted from the action point portion 116 into the gap 790 of the concrete skeletons 782, 784, 786 stacked to form the retaining wall. At this stage, the embankment material (earth and sand) is not spread out on the back surfaces of the concrete skeletons 782, 784, and 786 that have been piled up. After that, on the front and back surfaces of the concrete frames 782, 784, 786, the metal fitting body 110 of the retaining wall fixing metal fitting 100 is provided with notches 136 or 138, for example, part of the constituting surface is C-shaped or U-shaped. It is fixed by stoppers 132 and 134 . Specifically, the metal fitting main body 110 of the retaining wall fixing metal fitting 100 is sandwiched between notch portions 136 and 138 provided in the stoppers 132 and 134, respectively.

FIG. 3 is a partially cutaway cross-sectional view for explaining a state in which the retaining wall fixing bracket shown in FIG. 2 is arranged in a concrete frame.

In FIG. 3, the retaining wall fixing metal fitting 100 of the present invention has a bottom surface 118 extending from the fulcrum portion 114 to the power point portion 112 below the metal fitting main body 110 and is engaged with the upper surface of the concrete frame 782 . The engaging surface 122 of the projecting engaging portion 120 of the operating point portion 116 of the fitting body 110 is engaged with the vertical surface of the concrete skeleton 786 via the stopper 134 .

On the other hand, the concrete frame 786 and the engaging surface 112 of the engaging portion 120 are fixed without a gap by the stopper 134 . The support member 160 attached to the metal fitting main body 110 and the concrete skeletons 782 and 786 are fixed without gaps by stoppers 132 .

In this state, the retaining wall fixing bracket 100 of the present invention cannot be moved either upward or downward in FIG. 3, and is firmly fixed in the gap of the concrete frame. An object to be supported such as a bracket scaffolding 170 is firmly fixed to the support member 160 by separately provided bolts 172 and nuts 174 .

When removing the retaining wall fixing metal fitting 100 of the present invention from the state shown in FIG. After that, by rotating the force point portion 112 side upward about the fulcrum portion 114, the engagement of the point of action portion 116 (that is, the engagement surface 122 of the engaging portion 120 and the concrete frame 706 via the stopper 134). engagement) is released. In this state, the retaining wall fixing metal fitting 100 can be pulled out as it is from the gap of the concrete frame.

FIG. 4 is a diagram showing another example of the retaining wall fixing bracket of the present invention, and is a schematic cross-sectional view for explaining a state in which the bracket is arranged in a concrete frame.

In the retaining wall fixing fitting 200 of the present invention, the engaging portion 220 provided at the action point portion 216 of the fitting main body 210 is provided with a connecting bar disposed between the adjacent concrete skeletons instead of the engaging surface. 1 except that it has a receptacle 222 for receiving 240. FIG.

FIG. 5 is a partially enlarged view of the schematic cross-sectional view shown in FIG. As shown in FIG. 5 , in the retaining wall fixing bracket 200 of the present invention, the engaging portion 220 is provided with a receiving portion 222 in advance so as to accommodate the outer shape of the connecting bar 240 . This connecting bar 240 is arranged in a recess 794 provided in a portion of the concrete skeleton 788 . By adjusting the depth of the depression 794 provided in the concrete frame 788, the action point portion 216 and the engaging portion 220 of the retaining wall fixing bracket 200 of the present invention protrude from the back surface of the concrete frame 788 as shown in FIG. It is possible to form a substantially flat rear surface as a whole without the

In addition, the connecting bar 240 is arranged over the depressions 794, 794' of the adjacent concrete skeletons 788, 789 arranged on the concrete skeleton 782 as shown in FIG. For this reason, the retaining wall fixing bracket 200 of the present invention, which accommodates the connecting bar 240 in the receiving portion 222, is connected to the back side of the concrete frames 788, 789 (via the connecting bar 240) in the gap between the concrete frames 788, 789. ) can be indirectly engaged.

Referring to FIG. 4 again, in the retaining wall fixing fitting 200 of the present invention, the bottom surface 218 extending from the fulcrum portion 214 to the force point portion 212 in the lower part of the fitting body 210 is engaged with the upper surface of the concrete frame 782 in contact. ing. The action point portion 216 of the metal fitting main body 210 is indirectly engaged with the back side of the concrete skeleton 782 (via the connecting bar 240) as described above.

On the other hand, the support member 160 attached to the metal fitting main body 210 and the concrete frame 782 are fixed without a gap by the stopper 132 .

In such a state, the retaining wall fixing bracket 200 of the present invention cannot be moved either upward or downward in FIG. 4, and is firmly fixed in the gap of the concrete frame. An object to be supported such as a bracket scaffolding 170 is firmly fixed to the support member 160 by separately provided bolts 172 and nuts 174 .

When removing the retaining wall fixing metal fitting 200 of the present invention from the state shown in FIG. After that, by rotating the power point portion 212 side upward about the fulcrum portion 214, the engagement of the action point portion 216 (that is, the receiving portion 222 of the engaging portion 220 and the concrete skeleton 782 via the connecting bar 240). engagement) is released. In this state, the retaining wall fixing metal fittings 200 can be pulled out as they are from the gaps of the concrete frame.

FIG. 7 is a perspective view of a metal fitting showing still another example of the retaining wall fixing metal fitting of the present invention.

In FIG. 7, a retaining wall fixing metal fitting 300 of the present invention has a pair of L-shaped joints on the side opposite to the action point portion 316 with respect to the fulcrum portion 314 of the metal fitting main body 310 (that is, the power point portion (not shown)). A fitting body 310 in which members 352 and 354 are welded with a predetermined gap, and a support member 360 that can be accommodated in the gap between the pair of L-shaped members 352 and 354 are provided. In FIG. 7, support member 360 is attached to a pair of L-shaped members 352 and 354 within metal fitting 310 by hex bolts 324 and nuts 326 . The support member 360 is also provided with a plurality of screw holes 328 substantially parallel to the metal fitting body 310, like the support member 160 shown in FIG. A bolt (not shown) for attaching the object to be supported is arranged in the screw hole 328 .

FIG. 8 is a perspective view of a metal fitting showing still another example of the retaining wall fixing metal fitting of the present invention.

In FIG. 8, in the retaining wall fixing metal fitting 400 of the present invention, a support member 460 is welded and fixed on the side opposite to the action point portion 416 with respect to the fulcrum portion 414 of the metal fitting main body 410 (that is, the force point portion 412). ing. In FIG. 8, the support member 460 is provided with a bar screw 456 substantially parallel to the axial direction of the metal fitting main body 410 on the side opposite to the side to which the metal fitting main body 410 is welded. The support object can be attached to the retaining wall fixing bracket 400 by passing the bar screw 456 provided in the support member 460 through a hole such as a screw hole provided in the support object.

Alternatively, the retaining wall fixing bracket of the present invention may be as follows instead of the one shown above.

FIG. 9 is an exploded perspective view of a metal fitting for fixing a retaining wall according to still another example of the present invention.

A retaining wall fixing bracket 500 of the present invention includes a bracket body 510 and a support member 560 .

The metal fitting main body 510 is composed of one plate made of the same material as the metal fitting main body 110 shown in FIG. The fitting main body 510 includes a power point portion 512, a fulcrum portion 514 and an action point portion 516 in this order along the horizontal direction.

A force point portion 512 in the metal fitting main body 510 is a portion where a load from a support object attached to the support member 560 is directly applied to the concrete skeleton provided below. Here, in the retaining wall fixing metal fitting 500 shown in FIG. 9, the power point portion 512 of the metal fitting main body 510 is provided at a position higher than the fulcrum portion 514 in the horizontal direction. The force point portion 512 is engageable with a concrete skeleton positioned downward in the horizontal direction. Specifically, in FIG. 9, a substantially flat bottom surface 518 that is substantially parallel to the horizontal direction is partially formed from the fulcrum portion 514 to the power point portion 512 under the metal fitting main body 510 . All or part of the bottom surface 518 contacts and engages the upper surface of the underlying concrete skeleton to hold the support object fixed to the support member 560 in place on the concrete skeleton.

In addition, in the present invention, a bolt hole 513 for passing a hexagonal bolt 524 described later on the side of the power point portion 512 of the metal fitting main body 510, a hook hole 515 provided above the bolt hole 513, and the hook A shaft hole 517 provided closer to the fulcrum portion 517 than the hole 515 may be provided. Further, the fitting main body 510 includes a support plate portion 521 extending further downward than the force point portion 512 below the bolt hole 513 on the force point portion 512 side. The support plate portion 521 contacts the side surface of the support member 560 to support the support member 560, and can suppress rattling when a support object is attached to the retaining wall fixing bracket 500 of the present invention. In addition, in the embodiment shown in FIG. 9, the support plate portion 521 itself can also serve as a "support member" without providing the support member 560 in particular. That is, the object to be supported may be directly fixed to the support plate portion 521 without the support member 560 being provided.

The fulcrum portion 514 of the metal fitting main body 510 rotates the metal fitting main body 510 (or the retaining wall fixing metal fitting 500) upward about the fulcrum portion 514 so that the retaining wall fixing metal fitting is attached to the gap of the concrete skeleton. 500 can be attached and detached. Although FIG. 9 depicts fulcrum portion 514 as having an obtuse angle, fulcrum portion 514 is not necessarily limited to this shape in the present invention. For example, chamfering (for example, C-face machining or R-face machining) may be performed instead of the corners forming the obtuse angle.

In FIG. 9, the action point portion 516 of the metal fitting main body 510 is provided at a position higher than the fulcrum portion 514 in the horizontal direction. By providing the point of action portion 516 at such a position, the point of action portion 516 is inserted into the gap of the concrete frame, and the support object is attached to the support member 560 (that is, the force point portion 512 side). When it is closed, it can engage with a concrete frame that is placed above the horizontal direction. Specifically, in FIG. 9, an engagement surface 522 extending substantially flat in the horizontal direction is provided above the end of the metal fitting main body 510 (the side opposite to the power point portion 512). All or part of this engaging surface 522 can horizontally engage with the concrete frame disposed above the retaining wall fixing bracket 500 of the present invention, and the engaging surface 522 functions as the point of action portion 516. can.

In FIG. 9 , metal fitting body 510 is designed to provide sufficient rigidity to metal fitting body 510 on the left side of the figure centering on fulcrum portion 514 (that is, from force point portion 512 to fulcrum portion 514), for example, in the height direction. It has a somewhat wide shape, and on the right side of the figure with the fulcrum portion 514 as the center (that is, the side from the fulcrum portion 514 to the action point portion 516), when removing from the concrete frame, it is supported with the fulcrum portion 514 as the center. When the power point part 512 side of the wall fixing metal fitting 500 is lifted upward, the side from the fulcrum part 514 to the action point part 516 comes into contact with the concrete skeleton arranged below, preventing the retaining wall fixing metal fitting 500 from being removed. It has a gradually narrowed shape (especially a rounded shape at the bottom) to prevent it from being broken. These widths can be selected by those skilled in the art in consideration of the shape of the concrete frame itself to be fixed, the strength of the metal fitting main body 510, and the like.

The support member 560 is composed of a single rectangular bar, rectangular pipe, C-shaped bar, or L-shaped angle made of the same material as the metal fitting main body 110 shown in FIG. The support member 560 has its upper end attached to the metal fitting main body 510 and its lower end oriented substantially vertically. In FIG. 9, support member 560 is attached to metal fitting 510 by hex bolt 524 and nut 526 . Instead of such hexagonal bolts 524 and nuts 526, the support member 560 may be welded and integrated with the metal body 510 (for example, the support plate portion 521). The support member 560 is also provided with a plurality of screw holes 528 substantially parallel to the axial direction (horizontal direction) of the metal fitting body 510 . A bolt, string, rope, binding band, or the like (none of which is shown) for fixing the object to be supported is arranged in the screw hole 528 .

FIG. 10 is a schematic diagram for explaining how the retaining wall fixing bracket shown in FIG. 9 is fixed to the concrete frame.

The retaining wall fixing metal fitting 500 of the present invention is inserted from the action point portion 516 into the gap 890 between the concrete skeletons 804 and 806 stacked to form the retaining wall. At this stage, no embankment material (earth and sand) has been spread on the rear surfaces of the stacked concrete skeletons 804 and 806 . After that, on the surfaces of the concrete skeletons 804 and 806, the metal fitting body 510 of the retaining wall fixing metal fitting 500 is fixed by a stopper 532 having a C-shaped or U-shaped notch 536, for example, in part of the constituting surface. Specifically, the metal fitting main body 110 of the retaining wall fixing metal fitting 500 is clamped by the notch portion 536 provided in the stopper 532 .

In one embodiment, the stopper 532 is provided with a shaft hole 533 in the thickness direction. A single shaft 555 is passed through the shaft hole 533 of the stopper 532 and the shaft hole 517 of the metal fitting body 510 of the retaining wall fixing metal fitting 500, thereby fixing the retaining wall to the concrete skeletons 804 and 806. The fitting 500 and the stopper 532 can be firmly fixed.

FIG. 11 is a partially cutaway cross-sectional view for explaining a state in which the retaining wall fixing bracket shown in FIG. 9 is arranged in a concrete frame.

In FIG. 11, in the retaining wall fixing metal fitting 500 of the present invention, all or part of the bottom surface 518 extending in the substantially horizontal direction at the power point portion 512 in the lower part of the metal fitting main body 510 is in contact with the upper surface of the concrete frame 804 and engaged. are combined. The point-of-action portion 516 of the metal fitting main body 510 is engaged with the bottom surface 812 of the side projection portion of the concrete frame 806 by contacting all or part of the engaging surface 522 extending in the horizontal direction at the point-of-action portion 516 . there is In addition, in FIG. 11, a predetermined gap 519 is provided between the lower part of the metal fitting main body 510 and the upper surface of the concrete frame 804 .

On the other hand, there is no gap between the support member 560 attached to the metal fitting main body 510 and the concrete skeletons 804, 806 due to the stopper 532, and the shaft hole 533 (FIG. 10) of the stopper 532 and the shaft hole 517 of the metal fitting main body 510 are connected to the shaft 555. is penetrated.

In this state, the retaining wall fixing bracket 500 of the present invention cannot be moved either upward or downward in FIG. An object to be supported such as the bracket scaffolding 170 is firmly fixed to the support member 560 by separately provided bolts 172 and nuts 174 .

When removing the retaining wall fixing metal fitting 500 of the present invention from the state shown in FIG. After that, for example, by hooking a hook (not shown) to the hook hole 515 of the metal fitting body 510 from above and pulling it upward, the fulcrum portion 514 is moved slightly downward using the gap 519, and the fulcrum portion 514 is By rotating the force point part 512 side upward about be. In this state, the retaining wall fixing metal fittings 500 can be pulled out as they are from the gaps in the concrete frame.

FIG. 12 is a perspective view of a metal fitting showing still another example of the retaining wall fixing metal fitting of the present invention.

A retaining wall fixing bracket 600 of the present invention includes a bracket body 610 and a support member 660 . The metal fitting main body 610 and the support member 660 are formed by bending one plate made of the same material as the metal fitting main body 110 shown in FIG. The fitting main body 610 has a power point portion 612, a fulcrum portion 614 and an action point portion 616 in this order along the horizontal direction.

A force point portion 612 in the metal fitting main body 610 is a portion where a load from a support object attached to the support member 660 is directly applied to the concrete skeleton provided below. Here, in the retaining wall fixing metal fitting 600 shown in FIG. 12, the power point portion 612 of the metal fitting main body 610 is provided at a position higher than the fulcrum portion 614 in the horizontal direction. The force point portion 612 is engageable with a concrete skeleton positioned downward in the horizontal direction. Specifically, in FIG. 12, a substantially flat bottom surface 618 that is substantially parallel to the horizontal direction is partially formed from the fulcrum portion 614 to the power point portion 612 under the metal fitting main body 610 . All or part of the bottom surface 618 contacts and engages the upper surface of the underlying concrete skeleton to hold the support object fixed to the support member 660 in place on the concrete skeleton.

The fulcrum portion 614 of the metal fitting main body 610 rotates the metal fitting main body 610 (or the retaining wall fixing metal fitting 600) upward about the fulcrum portion 614 so that the retaining wall fixing metal fitting is attached to the gap of the concrete skeleton. 600 can be attached and detached. Although FIG. 12 depicts fulcrum portion 614 as having an obtuse angle, fulcrum portion 614 is not necessarily limited to this shape in the present invention. For example, chamfering (for example, C-face machining or R-face machining) may be performed instead of the corners forming the obtuse angle.

In FIG. 12, the action point portion 616 of the metal fitting main body 610 is provided at a position higher than the fulcrum portion 614 in the horizontal direction. By providing the point of action portion 616 at such a position, the point of action portion 616 is inserted into the gap of the concrete frame, and the support object is attached to the support member 660 (that is, the force point portion 612 side). When it is closed, it can engage with a concrete frame that is placed above the horizontal direction. Specifically, in FIG. 12, an engagement surface 622 extending substantially flat in the horizontal direction is provided above the end of the metal fitting main body 610 (the side opposite to the power point portion 612). All or part of this engaging surface 622 can horizontally engage with the concrete frame disposed above the retaining wall fixing bracket 600 of the present invention, and the engaging surface 622 functions as the point of action portion 616. can.

In FIG. 12, metal fitting body 610 is slightly bent in the width direction, for example, in order to provide sufficient rigidity to metal fitting body 610 on the left side of the figure centering on fulcrum portion 614 (that is, from force point portion 612 to fulcrum portion 614). It has a wide shape. Any length in the width direction can be selected by those skilled in the art in consideration of the shape of the fixed concrete frame itself, the strength of the metal fitting main body 610, and the like.

As described above, the support member 660 is integrated with the metal fitting main body 610 and has a bent portion 662 which is a part of the plate-like portion extending downward and arranged so as to protrude in the front direction. The support member 660 is oriented substantially vertically from the top end to the bottom end. In FIG. 12, support member 660 is provided with at least one threaded hole 628 . Bolts, strings, ropes, binding bands, etc. (none of which are shown) are arranged in the screw holes 628 for fixing the object to be supported.

FIG. 13 is a schematic diagram for explaining how the retaining wall fixing bracket shown in FIG. 12 is fixed to the concrete frame.

The retaining wall fixing metal fitting 600 of the present invention is inserted from the action point portion 616 into the gap 892 between the concrete frames 854 and 856 that are stacked to form the retaining wall. It should be noted that, at this stage, the embankment material (earth and sand) does not need to be spread on the back surfaces of the stacked concrete skeletons 854 and 856 .

In FIG. 13, in the retaining wall fixing metal fitting 600 of the present invention, all or part of the bottom surface 618 extending in the substantially horizontal direction at the power point portion 612 in the lower part of the metal fitting main body 610 is in contact with the upper surface of the concrete frame 854 and engaged. are combined. At the point of application 616 of the metal fitting main body 610 , all or part of the engaging surface 622 extending horizontally in the point of application 616 is in contact with the bottom surface (not shown) of the lateral projection of the concrete frame 856 . engaged.

In such a state, when the retaining wall fixing bracket 600 of the present invention is loaded downward through the screw holes 628 of the bent portions 662 provided in the support member 660, the retaining wall fixing bracket 600 can be either upward or downward in FIG. It cannot be moved and is firmly fixed in the gap between the concrete skeletons 854,856. An object to be supported (not shown) such as a bracket scaffold is firmly fixed to the screw hole 628 of the bent portion 662 provided in the support member 660 using means such as screws.

When removing the retaining wall fixing metal fitting 600 of the present invention from the state shown in FIG. , and by rotating the power point portion 612 upward around the fulcrum portion 614, the engagement of the action point portion 616 (that is, the engagement surface 622 and the lateral projection of the concrete frame 856) engagement with the bottom surface 622) is released. In this state, the retaining wall fixing bracket 600 can be pulled out from the gap of the concrete frame as it is.

FIG. 14 is a perspective view of a metal fitting showing still another example of the retaining wall fixing metal fitting of the present invention.

A retaining wall fixing bracket 700 of the present invention includes a bracket body 710 and a support member 760 . The metal fitting main body 710 and the support member 760 are made of the same material as the metal fitting main body 110 shown in FIG. The fitting main body 710 includes a power point portion 712, a fulcrum portion 714 and an action point portion 716 in this order along the horizontal direction.

A power point portion 712 in the metal fitting main body 710 is a portion where a load from an object to be supported attached to the support member 760 is directly applied to the concrete skeleton provided below. Here, in the retaining wall fixing metal fitting 700 shown in FIG. 14, the power point portion 712 in the metal fitting main body 710 is provided at a position that is approximately the same height as the fulcrum portion 714 in the horizontal direction. The force point portion 712 is engageable with a concrete skeleton positioned downward in the horizontal direction. Specifically, in FIG. 14, a substantially flat bottom surface 718 extending in the horizontal direction is formed from the fulcrum portion 714 to the power point portion 712 below the metal fitting main body 710 . All or part of the bottom surface 718 contacts and engages the upper surface of the underlying concrete skeleton to hold the support object fixed to the support member 760 in place on the concrete skeleton.

The fulcrum portion 714 of the metal fitting main body 710 allows the retaining wall fixing metal fitting 700 to be attached and detached from the gap of the concrete frame by rotating the metal fitting main body 710 (or the retaining wall fixing metal fitting 700) upward. .

In FIG. 14, the action point portion 716 of the metal fitting main body 710 is provided at a position higher than the fulcrum portion 714 in the horizontal direction. The tip of the point-of-action portion 716 has a hook shape and is engageable with a connecting bar disposed between concrete skeletons as described below. Since the point-of-action portion 716 has the hook shape at such a position, the point-of-action portion 716 is inserted into the gap of the concrete frame and the support object is attached to the support member 760 (that is, the force point portion 712 side). When installed, it can engage with a connecting bar of a concrete frame located above the horizontal direction.

As described above, the support member 760 is integrated with the metal fitting main body 710 and has at least one screw hole 728 in a part of the plate-like portion extending downward. Bolts, strings, ropes, binding bands, etc. (none of which are shown) are arranged in the screw holes 728 for fixing the object to be supported.

FIG. 15 is a schematic diagram for explaining how the retaining wall fixing bracket shown in FIG. 14 is fixed to the concrete frame.

The retaining wall fixing fitting 700 of the present invention is inserted from the action point portion 716 into the gap 896 of the concrete frames 862 and 864 that are horizontally arranged on the concrete frame 860 stacked to form the retaining wall. be done. At this stage, the embankment material (earth and sand) does not need to be spread on the back surfaces of the concrete skeletons 860, 862, and 864 that have been piled up.

In FIG. 15, a retaining wall fixing metal fitting 700 of the present invention has a bottom surface 718 extending substantially horizontally from a power point portion 712 to a branch portion 714 below a metal fitting main body 710. All or part of the bottom surface 718 is in contact with the upper surface of a concrete frame 860. Contacting and engaged. The point-of-action portion 716 of the metal fitting body 710 is in contact with and engaged with a connecting bar 888 that exists between the concrete skeletons 862, 864 that are horizontally arranged side by side.

In this state, the retaining wall fixture 700 of the present invention can be moved either upward or downward in FIG. It is firmly fixed in the gaps of the concrete frames 860, 862, 864. An object to be supported (not shown) such as a bracket scaffolding is firmly fixed to the screw holes 728 provided in the support member 760 using means such as screws.

When removing the retaining wall fixing metal fitting 700 of the present invention from the state shown in FIG. By pulling upward and rotating the power point portion 712 upward around the fulcrum portion 714, the engagement of the hook of the action point portion 716 with the connecting bar 888 is released. In this state, the retaining wall fixing bracket 700 can be pulled out from the gap of the concrete frame as it is.

(Method for Fixing Object to be Supported in Gap between Plural Concrete Frames)
Using the retaining wall fixing bracket of the present invention, the object to be supported is fixed, for example, in the gaps between a plurality of concrete frames in the following manner.

First, the retaining wall fixing metal fitting is inserted into the gap between the concrete frames from the end of the point of action of the metal fitting body so that the fulcrum portion of the metal fitting body is positioned downward. Next, by rotating the retaining wall fixing bracket downward, for example, around the fulcrum portion, the force point portion is engaged with the concrete frame arranged downward in the horizontal direction, and the action point portion is It is engaged with the concrete frame which is arranged above the horizontal direction. After that, the object to be supported is fixed to the supporting member of the retaining wall fixing bracket.

Specifically, as shown in (a) of FIG. 16 , a plurality of retaining wall fixing fittings 100 are attached between the concrete skeletons constituting the retaining wall 934 . After that, a supporting object such as the traffic signboard 900 is fixed to each of the attached retaining wall fixing metal fittings 100 using, for example, a bolt, a string, a rope, a binding band, or the like. Examples of supporting objects that can be secured in the present invention include bracket scaffolds; displays such as traffic signs, traffic signs, traffic banners, advertising signs, advertising banners, and the like.

In this way, the retaining wall fixing bracket of the present invention is useful in a work site for forming a retaining wall using the reinforced earth wall construction method. In addition, after the retaining wall is formed, it is useful in that display items describing various information can be displayed, for example, provisionally or over a long period of time, using the vast area of the retaining wall.

Furthermore, according to the present invention, when removing metal fittings from retaining walls, the need to use special heavy machinery such as aerial work platforms is eliminated. This eliminates the need to allocate special vehicles and qualified workers for removal and the costs required for such allocation, making it easier and safer than the current removal method, and reducing the economic burden.

100, 200, 300, 400, 500, 600, 700 Retaining wall fixing bracket 110, 210, 310, 410, 510, 610, 710 Bracket body 112, 212, 312, 412, 512, 612, 612 Power point part 114, 214, 314, 414, 514, 614, 714 fulcrum portion 116, 216, 316, 416, 516, 616, 716 action point portion 120, 220 engagement portion 122, 522 engagement surface 124, 524 hexagon bolt 126, 526 nut 128, 328 screw hole 132, 134, 532 stopper 136, 138, 536 notch 160, 360, 460, 560, 660, 760 support member 222 receiving part 240 connecting bar 352, 354 L-shaped member 456 rod screw 513 bolt hole 515 Hook hole 517 Shaft hole 555 Shaft

Claims (9)

A metal fitting for fixing a retaining wall to be inserted into gaps between a plurality of concrete frames arranged for forming a retaining wall, comprising a metal fitting main body having a force point portion, a fulcrum portion and an action point portion in this order along the horizontal direction, and a support member fixed to the end of the metal fitting body having the power point portion and extending along the vertical direction of the metal fitting body;
The force point portion of the fitting body is engageable with the concrete frame placed downward in the horizontal direction, and is at or above the fulcrum portion in the horizontal direction. and the point-of-action portion of the fitting body is engageable with the concrete frame disposed above the horizontal direction, and is higher than the fulcrum portion in the horizontal direction. Retaining wall fixing metal fittings installed at a high position. 2. The retaining wall fixing metal fitting according to claim 1, wherein said force point portion of said metal fitting main body is provided at a position substantially at the same height as said fulcrum portion with respect to said horizontal direction. 3. The retaining wall fixing metal fitting according to claim 2, wherein said action point portion of said metal fitting main body includes an engaging portion that engages said concrete frame disposed above in said vertical direction. 4. The retaining wall fixing fitting according to claim 3, wherein an end of said engaging portion comprises a receiving portion for receiving a connecting bar arranged over said plurality of concrete skeletons. 2. The retaining wall fixing metal fitting according to claim 1, wherein said force point portion of said metal fitting main body is provided at a position higher than said fulcrum portion with respect to said horizontal direction. 6. The retaining wall fixing metal fitting according to claim 5, wherein said action point portion of said metal fitting main body has an engaging portion that engages said concrete frame disposed above in said horizontal direction. A method for fixing bracket scaffolding to gaps between a plurality of concrete structures arranged for forming a retaining wall, comprising:
The retaining wall fixing metal fitting according to any one of claims 1 to 6 is placed in the gap of the concrete frame so that the fulcrum portion of the metal fitting body is positioned downward, and the end of the point of action of the metal fitting body is placed. the step of inserting from the part,
By rotating the retaining wall fixing bracket around the fulcrum portion, the force point portion is engaged with the concrete frame disposed downward in the horizontal direction, and the action point portion is moved to the a step of engaging with the concrete frame positioned above the horizontal direction; and a step of fixing a bracket scaffold to the support member of the retaining wall fixing bracket;
A method comprising: A method for fixing a display object in the gaps of a plurality of concrete frames arranged for forming a retaining wall, comprising:
The retaining wall fixing metal fitting according to any one of claims 1 to 6 is placed in the gap of the concrete frame so that the fulcrum portion of the metal fitting body is positioned downward, and the end of the point of action of the metal fitting body is placed. the step of inserting from the part,
By rotating the retaining wall fixing bracket around the fulcrum portion, the force point portion is engaged with the concrete frame disposed downward in the horizontal direction, and the action point portion is moved to the a step of engaging with the concrete frame arranged above the horizontal direction; and a step of fixing a display object to the support member of the retaining wall fixing bracket;
A method comprising: 9. The method of claim 8, wherein the display is a sign or banner.

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